Injector.



No. 851,041. I PATBNTED APR. 2a, 1907.

- w. T. STRAIN.

INJECTOR. I APBLIGATION FILED JUNEIB, 1906.

11311. I T '1 EF2 WITNESSES: INVENTOR THs NORRIS PITE'RS 00.,WASHINGTON, D. x.

rmrrnn snares ATENT orrrcn.

WILLIAM T. STRAIN, OF MARION,

INDIANA, ASSIGNOR OF THREE-FOURTHS TO WILLIAM H. LOOKE, JOSEPH LOOKE,AND 'HENRY W. LOOKE, OF

MARION, INDIANA.

INJECTOR.

Specification of Letters Patent.

Patented April23, 1907.

Application filed June 15, 1906- Serial No. 821,844.

T0 air/Z7 whom it may concern:

Be it known that I, WILLIAM'T. STRAIN, a citizen of the United States,residing at Marion, in the county of Grant and State of'Indiana, haveinvented certain new and useful Improvements in Steam-Injectors, ofwhich the following is a specification, reference being had therein tothe accompanying drawmgs.

This invention relates to steam-injectors, and will be hereinafter morefully set forth.

The object of this invention is to construct a steam-injector in suchamanner that the same will operate automatically to regulate the supplyof water thereto and to control the flow therethrough to the feed-pipeof the boiler. I attain this object by means of the j mechanismillustrated in the accompanying drawings, in which similar numerals ofreference designate like parts throughout the sev-v eral views.

Figure 1 is an exterior view of my invention of an injector, and Fig. 2is a'longitudinal sectional view of the same.

The outer casing or body 1 of this injector is preferably formed of oneintegral piece and has its ends open. The body 1 of the injector isprovided with the feed or water supply pipe 2 and the overflow-pipe 3.

The steam-supply pipe 4. is removably secured to the steam-inlet end ofthe body of the injector by means of a coupling-nut 5, and the boilerfeed-pipe 6, which is connected to the boiler to be fed, is alsoremovably se cured to the discharging end of the casing or body 1 by asuitable coupling-nut 7.

The steam-nozzle 8 is turned at its enlarged portion to neatly fit thebore of the body 1, and thesaid nozzle is provided with the collar 9,which is adapted to fit into the collar-receiving recess 9, formed atthe end of the bore of said body 1. The steam-nozzle 8 is securely heldin position by the flange or collar end of the steam-pipe 4, which bearsagainst the collar end of said nozzle. The bore of the nozzle 8 istapered or gradually expands toward its discharging end, which end isprovided with the contacting lugs 10, which. lugs are provided for thepurpose of preventing the end of the movable mixing or suction nozzle 11contacting with the outlet end of the steam-nozzle 8 to shut off thesupply of water to the inlet end of the mixing nozzle 11, and therebystop the operation of the injector. The lugs or stops 10 project asufficient distance beyond the end of the steam-nozzle 8 to permit asufficiently-reduced supply of feed-water to enter the mix ing-nozzle 11to maintain the flow of the fluid through the injector.

The mixing-nozzle 11 is adapted to fit in and to slide longitudinally inthe intermediate reduced bore of the casing 1, and the same is providedwith a collar 12, which is adapted to bear or rest on the seat 13,formed integral with the casing or body 1 of the injector. This nozzleis also provided with a tapering or expanding bore, the smaller end of(pvhich bore is situated at its discharging en The receiving end of thecombining-tube 15 is provided with a series of outlet or overflow holes14., which extend radially of the said nozzle and are divided or spacedequally around the periphery thereof. The overflow-holes 14 are situatednear the edge of the receiving end of saidnozzle or combiningtube forthe purpose hereinafter described.

The combining and discharging tube 15 is provided with a bore which iscontracted or reduced at its central portion and is gradually tapered orexpands toward the ends of its borethat is to say, it is expandedgradually toward the inlet and outlet ends. The receiving end, or thatend of the combining and discharging tube or nozzle 15 situated next tothe mixing-nozzle 11, is provided with a collar 16, which is adapted torest or bear against the end of the bearing-bushing 17 to limit thelongitudinal movement of said tube or nozzle in one direction. Thecombining and discharging tube or nozzle 15 is adapted to slidelongitudinally in said bearingbush ing 17 toward the discharging end ofthe nozzle 11 and to contact therewith. The discharging end of thecombining and discharging tube 15 is provided with a closing-collar 18,which removably and adjustably secured on the end of said tube, as by ascrew-thread or other suitable means. The collar 18 is adapted to movewith the tube or nozzle 15 to contact with the end of the bushing 17situated in the recess 19 for the purpose of preventing a leakage orbackflow of the water from the boiler between the joint formed by theexterior cylindrical portion of the tube or nozzle 15 and itsbearing-bushing 17. The collar 18 is so adjusted on its tube or nozzle15 that it contacts with the end of said bushing situated in the recess19 simultaneously with the contacting of the receiving end of said tubeor nozzle 15 with the discharging end of the nozzle 11.

The operation of my invention is as follows: Steam is first admitted tothe steamnozzle 8 by the pipe 1, and the water is permitted to enter thepipe 2, which is drawn to and enters the nozzle 11 by the vacuum produced by the flow of the steam from the steam-nozzle 8 to and into thenozzle 11, in which latter nozzle the steam and water are mixed and flowto, into, and through the combining and discharging tube or nozzle 15,from which tube the steam and water is forcibly discharged into the pipe6 into the boiler.

It will be observed that with the above-described construction andarrangement of the steam-nozzle 8 and the mixing-nozzle 11 the flow ofwater to and through said mixingnozzle 11 is automatically regulated tosecure an unbroken and regular flow of water to and through thecombining and discharging tube or nozzle 15. It will also be noted thatshould the ilow of water from the mixing-nozzle 11 be, by any causewhatever, caused to stop or break or be retarded or diminished in volumeto such an extent as to cause the injector to work unsatisfactorily fora short instant of time the combiningand discharging tube 15, owing tothe back pressure from the boiler, will move toward the nozzle 11 toreduce the space between the ends of the nozzles 11 and 15, and therebyrestore the operation of the injector. It will be also noted that whentoo much water is fed to the inlet end of the nozzle 11 the said nozzle11 will approach the end of the steamon said nozzle, a feed-water inlet,and a lifting and mixing nozzle, having a longitudinal movement towardsaid steamnozzle, of an overflow situated adjacent the discharging endof said mixing-nozzle and a combining and discharging nozzle.

2. In an injector for steam-boilers, the combination with asteam-nozzle, end stops on said nozzle, a feed-water inlet, and alifting and mixing nozzle having a longitudinal movement toward saidsteam-nozzle and an overflow situated adjacent to the discharging end ofsaid lifting and mixing nozzle, of a combining and discharging nozzlesituated on line with and having a longitudinal motion toward and tosaid lifting and mixing nozzle, said combining and discharging nozzlehaving a series of peripheral overflowholes situated adjacent to thereceiving end of said nozzle and means for limiting the longitudinalmovement of said combining and discharging nozzle.

3. In an injector for steam-boilers, the combination with asteam-nozzle, and stops on said nozzle, a feed-water inlet and a liftingand mixing nozzle having a longitudinal movement toward saidsteam-nozzle, of an overflow situated adjacent to the discharging end ofsaid lifting and mixing nozzle, a combining and discharging nozzlesituated on line with and having a longitudinal motion toward and tosaid lifting and mixing nozzle, said combining and discharging n0zzlehaving a series of peripheral overflowholes situated adjacent to thereceiving end of said nozzle, means for limiting the motion of saidcombining and discharging nozzle, and a closing-collar adjustablymounted on the discharging end of said combining and discharging nozzle.

In testimony whereof I affix my signature in presence of two Witnesses.

WILLIAM T. STRAIN.

Witnesses JosEPH H. LooKE, WILLIAM A. LooKE.

